Obadiah, containing only one chapter, is the shortest book in the Old Testament. In it is given a prophetic interpretation of a great calamity that has already occurred in Edom and a prediction of a universal judgment.

Obadiah 1

1:19 And they of the south shall possess the mount of Esau; and they of the plain the Philistines: and they shall possess the fields of Ephraim, and the fields of Samaria: and Benjamin shall possess Gilead.